腹壁可触及肿物的MRI鉴别（二）

Miscellaneous Lesions 其他出血.. Urachal Cyst 褶尿管出血A urachal cyst may be seen in between the umbilicus and the bladder. It is usually situated in the lower third of the urachus but can be seen just inferior to the umbilicus. These cysts may appear totally anechoic or may reveal low-level internal echoes (Figure 11 )褶尿管出血出自褶和尿道错综复杂，往往座落褶尿管的下1/3 ，但也可出自大部分座落褶下。这些出血可展现出为实质上无水声或较高水声。

Figure 11. A, Urachal cyst. The cyst is infected and contains faintly echogenic fluid. B, Urachal cyst. The anterior wall of the tense cyst produces reverberation artifacts. 平面图11A，褶尿管出血，此出血已受病毒，内部含有要强水声的液体。B，褶尿管出血，紧绷的出血前壁产生反射伪影。

..Endometriosis胎盘上皮细胞异位Endometriosis of the abdominal wall may occur as a long-term complication of uterine surgery. It has no specific appearance but is seen as a focal mass at the scar of previous surgery with attacks of cyclic pain and swelling (Figure 12 ).腰椎胎盘上皮细胞异位是胎盘开刀后的长期合并症，无特殊展现出，但可于实际上开刀的瘢痕两处见一局部肿物，并有周期连续性的疼痛和肿胀。

Figure 12. Endometriosis in a cesarean delivery scar. 平面图12 ，剖宫产伤疤两处胎盘上皮细胞异位

...Abdominal Wall Hematoma 腰椎血肿A rectus sheath hematoma may develop after paroxysms of coughing or sneezing or after seizures. The underlying cause is usually either anticoagulant therapy or some bleeding disorder. Because these hematomas are limited within the rectus sheath, they are not very big. Their shape depends on their location. Above the arcuate line, they are usually ovoid in shape with the long axis superoinferior and are seen on one side (Figure 13A ). Below the arcuate line, because of the absence of the linea alba, they can extend across the midline. Then the hematoma may be seen as a padlike lesion with its maximum length along the transverse axis.21–23 In one neonate, an abdominal wall hematoma was seen to spread transversely in the supraumbilical region (Figure 13, B and C ). In patients with post surgical disseminated intrascular coagulation, large hematomas are seen in the abdominal wall in the vicinity of the surgical scar (Figure 13D ).腹直肌鞘血肿可发生于发烧连续性气喘后、喷嚏或抑郁症发烧后，其主因往往是抗凝疗法或出血连续性疾病。由于血肿限制于腹直肌鞘内，往往不很大，其形状根据所两处右方而定，在弓状该线以上，血肿常为紫红色，角速度红褐色上下朝向，可于外侧见到（平面图13A）；在弓状该线以下，由于腹橘黄色缺如，可扩展到横过中该线，因此血肿展现出为分丝状，其最小长度座落中点上。在产妇腰椎血肿可出自褶上横向扩展到（平面图13B、C）。术后高能量连续性微血管内心肌的病人可于腰椎开刀瘢痕附近见到大的血肿（平面图13D）。

Figure 13. A, Rectus sheath hematoma in an elderly woman after severe cough. Arrows point to the fascia transversalis. B, Abdominal wall hematoma in a neonate. C, Abdominal wall hematoma overlying umbilical vein insertion in a neonate. UV indicates umbilical vein. D, Abdominal wall hematoma in a cesarean delivery scar in a patient with disseminated intrascular coagulation. 平面图13A，一中年妇女震荡气喘后腹直肌鞘血肿，箭头示意腹横动脉。B，产妇腰椎血肿。C，一产妇褶腹腔附着两处里面的腰椎血肿。UV，褶腹腔。D，一高能量连续性微血管内心肌的剖宫产术后病人疤痕两处腰椎血肿。

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